[转载]C#读写配置文件(XML文件)

.xml文件格式如下

[xhtml] view plaincopy

1. <?xml version="1.0" encoding="utf-8"?>
2. <!DOCTYPE DataAccess[]>
3. <DataAccess>
4. <appSettings>
5. <add key="StartTime" value="9" />
6. <add key="EndTime" value="6" />
7. </appSettings>
8. </DataAccess>

C#初始化

[c-sharp] view plaincopy

1. private static XmlDocument xmlIAUConfig;
2. static ConfigManager()
3. {
4. xmlIAUConfig = new XmlDocument();
5. XMLPath = Assembly.GetExecutingAssembly().CodeBase;
6. Int32 i = XMLPath.LastIndexOf("/");
7. XMLPath = XMLPath.Remove(i);
8. XMLPath = XMLPath + @"/abc.xml";
9. xmlIAUConfig.Load(XMLPath);
10. }

获取某个节点的值

[c-sharp] view plaincopy

1. public static String GetValue(String key)
2. {
3. xmlIAUConfig.Load(XMLPath);
4. String value;
5. String path = @"//DataAccess/appSettings/add[@key='" + key + "']";
6. XmlNodeList xmlAdds = xmlIAUConfig.SelectNodes(path);
7. if (xmlAdds.Count == 1)
8. {
9. XmlElement xmlAdd = (XmlElement)xmlAdds[0];
10. value = xmlAdd.GetAttribute("value");
11. }
12. else
13. {
14. throw new Exception("IAUConfig配置信息设置错误：键值为" + key + "的元素不等于1");
15. }
16. return value;
17. }

修改某个节点为谋值

[c-sharp] view plaincopy

1. public static void SavaConfig(string strKey, string strValue)
2. {
3. XmlDocument XMLDoc = new XmlDocument();
4. XMLDoc.Load("abc.xml");
5. XmlNodeList list = XMLDoc.GetElementsByTagName("add");
6. for (int i = 0; i < list.Count; i++)
7. {
8. if (list[i].Attributes[0].Value == strKey)
9. {
10. list[i].Attributes[1].Value = strValue;
11. }
12. }
13. StreamWriter swriter = new StreamWriter("abc.xml");
14. XmlTextWriter xw = new XmlTextWriter(swriter);
15. xw.Formatting = Formatting.Indented;
16. XMLDoc.WriteTo(xw);
17. xw.Close();
18. swriter.Close();
19. }